9fans - fans of the OS Plan 9 from Bell Labs
 help / color / mirror / Atom feed
From: Charles Forsyth <charles.forsyth@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] A couple questions about /dev/draw and /dev/kbmap
Date: Thu,  5 May 2016 17:00:54 +0100	[thread overview]
Message-ID: <CAOw7k5hTO4KKP6Lg4yWp=tKuGJUjYz162VsDqRE=p_TrfMr85g@mail.gmail.com> (raw)
In-Reply-To: <3115414fc57b1a87c6ffe6744f4a65a0@felloff.net>

[-- Attachment #1: Type: text/plain, Size: 641 bytes --]

On 5 May 2016 at 14:56, <cinap_lenrek@felloff.net> wrote:

> libdraw determines the iounit in initdraw() and sizes
> its write buffer accordingly. uploading pixels into a image
> will split the y/Y operation in multiple ones so they fit
> into the buffer.

Yes, and the data doesn't go through rio (unlike an older system), but to
/dev/draw, so in the local graphics
case the kernel is pulling the draw data directly from the client memory:
it doesn't go through 9p.
If /dev/draw is imported from a remote system, the local system will
generate the 9p, and the remote
will receive that, turn round and access its /dev/draw.

[-- Attachment #2: Type: text/html, Size: 1071 bytes --]

  reply	other threads:[~2016-05-05 16:00 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-04 20:20 Dave MacFarlane
2016-05-04 21:53 ` hiro
2016-05-05  2:45 ` cinap_lenrek
2016-05-05 13:12   ` Dave MacFarlane
2016-05-05 13:16     ` Aram Hăvărneanu
2016-05-05 13:56     ` cinap_lenrek
2016-05-05 16:00       ` Charles Forsyth [this message]
2016-05-05 15:38     ` Skip Tavakkolian

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAOw7k5hTO4KKP6Lg4yWp=tKuGJUjYz162VsDqRE=p_TrfMr85g@mail.gmail.com' \
    --to=charles.forsyth@gmail.com \
    --cc=9fans@9fans.net \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).